Question

[Shiro Naruko]

tính nhanh : a) - 4 . 2 . 6 . 25 . ( - 7 ) . 5
b ) 16 . ( 38 - 2 ) - 38 ( 16 - 1 )
c ) ( - 41 ) : ( 59 + ) + 59 ( 41 - 2 )
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Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(=4\cdot2\cdot6\cdot25\cdot7\cdot5\)

\(=\left(4\cdot25\right)\cdot\left(2\cdot5\right)\cdot\left(6\cdot7\right)\)

\(=42\cdot100\cdot10=42000\)

b: \(=16\cdot38-16\cdot2-38\cdot16+38\)

\(=-32+38=6\)